Process of extracting oils.



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PROCESS 0F EXTHAGTING UILS.

(Application filed Nov. 7, 1899.)

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UNTTED STATES PATENT OFFICE.

AUGUST FREDRIK LUNDEBERG, OF STOCKHOLM, SW'EDEN.

PROCESS OF EXTRACTING OILS.

SPECIFICATION forming part of Letters Patent No. 707,854, dated August 26, 1902.

Application led November '7, 1899. Serial No. 736,169. (No specimens.)

To 0U whom t may concern.-

Be it known that LAUGUsr FREDRIK LUNDE- BERG, a subject of the King of Sweden and Norway,and a resident ot'Stockholm, Sweden, have invented certain new and useful Improvements in Extracting Vegetable Oils, of which the following is a specification.

This invention relates to the extraction of Vegetable oils by pressure; and the object of the invention is to increase the yield of oil from the seed.

By the ordinary method of extracting oil from seed by heat and pressure the seed is first heated, then crushed, then heated, and then pressed. I ind, however, that by first crushing the seed while cold, then heating the crushed mass, and then a second time crushing the mass before pressing an important advantage is gained. The second crushing afterheating causes the cells of the seed, which have been expanded by the heating, to burst readily and facilitate the outtlow of the oil under pressure. W'hen seed is treated in this manner, it will be found that the percentage of oil remaining in the cake is greatly reduced, and the time required for pressing will also be reduced from fteen to twentyfive per cent.

The diagrammatic view in the drawing illustrates a suitable apparatus for carrying out the process.

1n the drawing, l is a hopper from which the seed is fed down to crushing-rolls 2 in a casing 3. From the casing the crushed seed passes to an elevator 4, which carries it up and discharges itinto a heater 5. This heater may be a box or receptacle with double walls and bottom, the space between the walls to receive steam. Within the heater, which is represented in section, is a rotating stirrer 6, 4o

which stirs the ground mass and pushes it out through an outlet 7, whence it iiows, by an inclined spout 8, to a second Crusher 9, similar to that first named. From this second Crusher the crushed seed falls into a second receptacle l0, which may be heated in the same way as the receptacle 5 and which has in it a stirrer similar to that in the receptacle 5. From the receptacle lO the Vground seed is taken to the press ll, where it is pressed 5o vegetable oils,which consists in first crushing 5 5 the seed while cold, then heating it, then crushing it a second time, and finally pressing it.

In witness whereof I have hereunto signed my name in the presence of two subscribing 6o witnesses.

AUGUST FREDRIK LUNDEBERG.

Witnesses:

HANS B. OHEssoN, J. F. A. RUTBCK. 

